Azo dyes for wool.



UNITED srnTEs PATENT OFFICE.

PETER- HAUPTMANN AND ALBERT RQHDE, or Lnvnnirusnn, NEAR COLOGNE, GEB- MANY, ASSIGNORS T0 SYNTHETIC rnrnn'rs (20., mo er NEW YORK, N.Y., A

CORPORATION OF NEW YORK.

AZO DYES FOR WOOL.

No Drawing.

Specification of Letters Patent. Application filed September 4, 1913. Serial Il'o. 788,137.

Patented 0015.13, 1914..

To all to tom it may concern:

Be-it known that we, Pn'rnn HAUPTMANN and ALmsn'r Roi-ion, doctors of philosophy,

probably the formula: I

ar lc-arbonvlamino compounds having most lilstands for a substituent, such as -CH,,

zoyldiphenylamin, metaaminohenzoyldiphenylamin, para aminobewzoyl ethyl alphanaphthylainin; meta 4 aminobenzoyl ethylalpha naphthylamin, para aminobenzoylmethyl-beta naphthylamin ,f para-ami nmanisoylcliphenylamin with azo 'dyestufi com ponents methylketolsulfonic acids, alphaand beta naphthol sulfonic acids, acidyl periaminm naphthol sulfonic acids, etc. I,

' The new dyes are after being driedand pulverized generally from yellowish to i'eddish powders soluble in water generally with a yellowish to bluish-red coloration, which dye wool in an'acid bath generally from greenislnyellow to bluish-red shades fast to, light and to milling. Theyyield upon reduction with stannous chlorid and'hydrochloric acid a disubstituted aminobenzoyh anus, such as aminobenzoylethylanilin, a minobenzoyldiphenylami'n, aminobenzoylcthylczirbazol, aminohenzoyl ethyl alphanapI1th' lami.n, etc, and an aromatic amin c. r aminopyrazo-lonesulfonio acid, aminoinethylkctolsulionic acid, amino-alphaor heta-naphtholsulionic acid, aminoaoidylperiaminonaphtholsulfonic acid, etc.

0. g. pyrazolone 'sulfonic acids,

fully the following example is given, the parts beingby weight :27 parts of the sulfate of para-aminobenzoyldiphenylamin are diazotized with 24: parts of sulfuric acid (4-0" B6.) and with 5 parts of sodium nitrite. lhe diazo compound isthen slowly added to asolution of 16 parts of methylketolsultonic acid of the formula I As.

in. 800 parts of water, whielihas been acidulated with 10 parts of sulfuric acid. After fifteen hours stirring the yellow dyestufi separates, it is filtered otl from the acid n1ixturc,.1nixcd with. 30 parts of solid soda and dried. After being dried and pulverized it is a yellowish-brown powder, which is soluble inwater with a yellowish coloration and which dyes wool very pure yellow shades fast to light and to milling. The new dyestulf possesses in a free state most probably the formula:

Q In order to illustrate the new process more It yields upon reduction with stannous cl lorid and hydrochloric acid para-amino henzoyldiphenylamin melting at 208 C. and aminomethylketolsulfonic acid.

in an analogous manner other dyestufi's of this series can be obtained. The dyestufl 013- tained from para-aminobenzoylethyl-alphanaphthylamin and pyrazolone-mono-sulfonic acid is after being dried and pulverized a ell'owish oowder soluble in water with a greenish-5 llow coloration, wh ch dyes wool in an acld th yellowish shades very fast to lightla iid td'nnlling. Another dye from meta aminohenzoylethyl alpha naphth-ylsulfonic acid is after being dried and pul-' dyes wool. in an chloric acid a disubstituted verized a brownish-red powder, soluble in water with a bluish-red coloration, which acid bath apure bluish-red shade very fast to light and to milling.

1. 'lhe hei ein described new azo dyestufls having most probably the formula,

The herein described new azo dyestuffshaving 'most probably the formula:

R N.co.06rn.N=N.x

in which It stands for a suitable substituent and X for the radical of an azo component, and being derivable from diazo compounds of disubstituted aminobenzoylamino compounds and azo dyestulf components, which areafter being dried and pul- -verized generally from yellowish'to reddish powders soluble in water generally with .a. yellowish to bluish-red coloration; yielding upon reduction with stannous chlorid and hydrochlori acid a disubstituted aminobenzoylamin and, an aromatic amin; and dyeing wool generally from greenish-yellow to bluish-red shades fast to lightand to milling,

45. substantially as described.

The herein described new azo dyestuffshaving most probably the formula,

in which R stands for an aryl radical and X for the radical of an azo dyestufl component, derivable from diazo compounds of d iaryl a1ninoarylearbonylamino' and azo dyestuil components, which-tire after being dried and pulverized generally from yellowish to reddish powders soluble in water generally with a yellowish to bluish-red coloration; yielding. upon reduction with compounds.

1 dyestuff staunmis chlorid and hydrochloric acid a diarylaminoarylearbonylamin and an aromatic amin; and dyeing wool generally from greenisir-yellow to bluish-red shades fast to light and to milling, substantially as described.

4-. The herein described new azo dyestuffs having most probably the formula,

in which It stands I or a suitable substituent and X for the radical of a ketol sulfonic acid, derivable from diazo compounds of disul'istituted amiiioarylcarbonylamino compounds and k'etol sul'l'onie acids, which-are after being. dried and pulverized generally from yellowish to reddish powders soluble in water generally with a yellowish to bluishred coloration; yielding upon reduction with s annous chhnridand hydroehlorid acid a disml'istituted ain'inoarylcarbonylamin and an aminoketol sulfonic acid; and dyeing wool generally from greenish-yellow to bluish-red shades fast to light and to milling, substantially as described.

The herein described new .azo dyestufl having most probably the formula:

N=N--C- Nn so,H which is after being dried and pulverized a yellowish-brown powder soluble in water with a yellowish coloration; yielding upon reduction with stannous chlorid and hydrochloric acid para-aminobenzoyldiphenylamin and amino-methylketolsulfonic acid; and dyeing wool from an acid bath pure yellow shades fast to light and to milling, substantially as described.

In testimony whereof we have hereunto set our hands in the presence of two subscribing witnesses.

PETER HAUPTMANN. 8. ALBERT ROHDE. 1,. 5.

lVit-ner-rscs ALBERT KEIFER, JULIUS FESTNER. 

